Hazardous Area Oxymitter DR
Instruction Manual
SECTION 4
MAINTENANCE AND SERVICE
When working on this equipment on the laboratory bench, be aware that the probe, probe tube, and flame arre- stor hub can be hot [up to 370°C (698°F)] in the region of the probe heater.
Install all protective equipment covers and safety ground leads after equip- ment repair or service. Failure to in- stall covers and ground leads could result in serious injury or death.
4-1 OVERVIEW
This section identifies the calibration methods available and provides the procedures to main- tain and service the Hazardous Area Oxymitter DR.
4-2 CALIBRATION
The Hazardous Area Oxymitter DR should be calibrated when commissioned. Under normal circumstances the probe will not require fre- quent calibration. When calibration is required, follow the procedure described in the Instruction Bulletin applicable to your electronics package.
It is recommended that the Hazardous Area Oxymitter DR be removed from the stack for all service activities. Wear heat resistant gloves and cloth- ing to remove probe from stack. Nor- mal operating temperature of diffusor and vee deflector are approximately 316 to 472°C (600 to 800°F). The unit should be allowed to cool and be taken to a clean work area. Failure to comply may cause severe burns.
Disconnect and lock out power before working on any electrical components. There is voltage up to 115 VAC.
4-3 HAZARDOUS AREA OXYMITTER DR REPLACEMENT
a. Remove.
1. Turn off power to the system. | 4 |
2.Shut off the calibration gases at the cylinders and the instrument air.
3.Disconnect the calibration gas and in- strument air lines from the Hazardous Area Oxymitter DR.
4.While facing the Hazardous Area Oxymitter DR and looking at the Rosemount label, remove screw (11, Figure
5.Loosen the screw on the heater termi- nal cover and slide the cover back to access the heater terminals. Loosen the heater terminal screws and remove the leads. Loosen the ground lug screws and remove the leads. Slide the heater power leads out of the heater power port.
6.Loosen the oxygen and heater thermo- couple signal terminal screws. Remove the leads from the terminals and slide the wires out of the signal port.
7.Remove insulation to access the mounting bolts. Unbolt the Hazardous Area Oxymitter DR from the stack and take it to a clean work area.
Rosemount Analytical Inc. A Division of Emerson Process Management | Maintenance and Service |